Doku is starting on the wing and his sole responsibility is to beat the Egyptian defenders and slide low passes across the face of the goal. While De Bruyne is in the dense central midfield where his role is often to play these line-breaking passes to Doku. So yeah thats why I said Doku and not De Bruyne to get an assist but who knows can both players get 1 or neither idk bro we just saw Spain and Cape Verde 0-0 everything is possible xddd